Montecito, California

The US is home to some of the most polluted air on the planet as smoke from 120 out-of-control Canadian wildfires drifts across the border.

Extreme heat coupled with humidity will make it feel like 109 degrees Fahrenheit as the holiday weekend approaches.

As worries about a growing super El Niño mount, new findings suggest a radical solution to mitigating its impacts.

The probe sent back the first pictures of the asteroid Kamo’oalewa. Next step: landing on the surface and collecting samples to send back to Earth.

As the climate phenomenon sends warm water surging across the eastern Pacific, some parts of the fishing industry are suffering—but other regions are seeing a windfall.

Never mind the “heat death of the universe.” Entropy is just a bridge between two levels of reality.

Official case counts likely capture only a fraction of US cyclosporiasis infections, and the outbreak is likely to get worse before it gets better.

Roughly 100 fires are raging out of control in Ontario, sending smoke streaming 1,000 miles to the south and east.

The lab will beam back data to train AI models to predict how proteins behind age-related diseases like Alzheimer’s and certain cancers behave.

The EPA has proposed a rule change that would let states decide how much input the public has on air pollution permits. It would be a huge boon for data centers increasingly reliant on fossil fuels.

New satellite imagery reveals how much terrain has shifted in the wake of the twin quakes.

A key delay from a state agency means robotaxi rides in the company’s new Ojai vehicle might be free for a few more months.